Exclude building signin view controller and its delegate on ChromeOS

chrome/browser/ui/views/frame/browser_view.h

Index: chrome/browser/ui/views/frame/browser_view.h
diff --git a/chrome/browser/ui/views/frame/browser_view.h b/chrome/browser/ui/views/frame/browser_view.h
index d2172e5a99568b3a15133d6c131f8eb2134b1f07..5605d075f49e19560ec962b8a065dfc42db409bd 100644
--- a/chrome/browser/ui/views/frame/browser_view.h
+++ b/chrome/browser/ui/views/frame/browser_view.h
@@ -23,7 +23,6 @@
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/exclusive_access/exclusive_access_context.h"
 #include "chrome/browser/ui/infobar_container_delegate.h"
-#include "chrome/browser/ui/signin_view_controller.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "chrome/browser/ui/views/exclusive_access_bubble_views_context.h"
 #include "chrome/browser/ui/views/extensions/extension_keybinding_registry_views.h"
@@ -708,8 +707,6 @@ class BrowserView : public BrowserWindow,
 
   std::unique_ptr<WebContentsCloseHandler> web_contents_close_handler_;
 
-  SigninViewController signin_view_controller_;
-
   // The class that registers for keyboard shortcuts for extension commands.
   std::unique_ptr<ExtensionKeybindingRegistryViews>
       extension_keybinding_registry_;